20201868667 has 4 divisors (see below), whose sum is σ = 20288572200. Its totient is φ = 20115165136.

The previous prime is 20201868607. The next prime is 20201868697. The reversal of 20201868667 is 76686810202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201868667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201868607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43351417 + ... + 43351882.

It is an arithmetic number, because the mean of its divisors is an integer number (5072143050).

Almost surely, 2^20201868667 is an apocalyptic number.

20201868667 is a deficient number, since it is larger than the sum of its proper divisors (86703533).

20201868667 is an equidigital number, since it uses as much as digits as its factorization.

20201868667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86703532.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 20201868667 in words is "twenty billion, two hundred one million, eight hundred sixty-eight thousand, six hundred sixty-seven".